Connection strings for SQL Server 2005 http://www.connectionstrings.com/

最新推荐文章于 2025-06-07 19:24:53 发布
最新推荐文章于 2025-06-07 19:24:53 发布
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分类专栏： SqlServer 文章标签： sql server database server express security string
本文详细介绍了多种场景下SQL Server的连接字符串配置方法，包括标准安全连接、受信任连接、通过IP地址连接、启用MARS（多活动结果集）、数据库镜像等功能，并提供了不同驱动和环境下的示例。

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Standard Security
Data Source= myServerAddress; Initial Catalog= myDataBase; User Id= myUsername; Password= myPassword;
Use serverName/instanceName as Data Source to connect to a specific SQL Server instance.

Are you using SQL Server 2005 Express? Don't miss the server name syntax Servername/SQLEXPRESS where you substitute Servername with the name of the computer where the SQL Server 2005 Express installation resides.
 
Standard Security alternative syntax
This connection string produce the same result as the previous one. The reason to include it is to point out that some connection string keywords have many equivalents.
Server= myServerAddress; Database= myDataBase; User ID= myUsername; Password= myPassword; Trusted_Connection= False;
 
 
Trusted Connection
Data Source= myServerAddress; Initial Catalog= myDataBase; Integrated Security= SSPI;
 
 
Trusted Connection alternative syntax
This connection string produce the same result as the previous one. The reason to include it is to point out that some connection string keywords have many equivalents.
Server= myServerAddress; Database= myDataBase; Trusted_Connection= True;
 
 
Connecting to an SQL Server instance
The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.
Server= myServerName/theInstanceName; Database= myDataBase; Trusted_Connection= True;
 
 
Trusted Connection from a CE device
Often a Windows CE device is not authenticated and logged in to a domain. To use SSPI or trusted connection / authentication from a CE device, use this connection string.
Data Source= myServerAddress; Initial Catalog= myDataBase; Integrated Security= SSPI; User ID= myDomain/myUsername; Password= myPassword;
Note that this will only work on a CE device.
Read more about connecting to SQL Server from CE devices here
 
Connect via an IP address
Data Source= 190.190.200.100,1433; Network Library= DBMSSOCN; Initial Catalog= myDataBase; User ID= myUsername; Password= myPassword;
DBMSSOCN=TCP/IP. This is how to use TCP/IP instead of Named Pipes. At the end of the Data Source is the port to use. 1433 is the default port for SQL Server.
How to define which network protocol to use
 
Enabling MARS (multiple active result sets)
Server= myServerAddress; Database= myDataBase; Trusted_Connection= True; MultipleActiveResultSets= true;
Use ADO.NET 2.0 for MARS functionality. MARS is not supported in ADO.NET 1.0 nor ADO.NET 1.1.
Streamline your Data Connections by Moving to MARS, by Laurence Moroney, DevX.com
 
Attach a database file on connect to a local SQL Server Express instance
Server= ./SQLExpress; AttachDbFilename= c:/mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Attach a database file, located in the data directory, on connect to a local SQL Server Express instance
Server= ./SQLExpress; AttachDbFilename= |DataDirectory|mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Using an User Instance on a local SQL Server Express instance
The User Instance functionality creates a new SQL Server instance on the fly during connect. This works only on a local SQL Server 2005 instance and only when connecting using windows authentication over local named pipes. The purpose is to be able to create a full rights SQL Server instance to a user with limited administrative rights on the computer.
Data Source= ./SQLExpress; Integrated Security= true; AttachDbFilename= |DataDirectory|/mydb.mdf; User Instance= true;
To use the User Instance functionality you need to enable it on the SQL Server. This is done by executing the following command: sp_configure 'user instances enabled', '1'. To disable the functionality execute sp_configure 'user instances enabled', '0'.
 
Database mirroring
If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.
Data Source= myServerAddress; Failover Partner= myMirrorServerAddress; Initial Catalog= myDataBase; Integrated Security= True;
There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.
Read more about database mirroring in this Microsoft TechNet article "Database Mirroring in SQL Server 2005"
 
Asynchronous processing
A connection to SQL Server 2005 that allows for the issuing of async requests through ADO.NET objects.
Server= myServerAddress; Database= myDataBase; Integrated Security= True; Asynchronous Processing= True;
 
 

SQL Native Client 9.0 OLE DB provider

Type:    OLE DB Provider
Usage:  Provider=SQLNCLI
Manufacturer:  Microsoft
More info about this provider »
Customize string
example values »
Standard security
Provider= SQLNCLI; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
Are you using SQL Server 2005 Express? Don't miss the server name syntax Servername/SQLEXPRESS where you substitute Servername with the name of the computer where the SQL Server 2005 Express installation resides.
 
Trusted connection
Provider= SQLNCLI; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes;
Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"
 
Connecting to an SQL Server instance
The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.
Provider= SQLNCLI; Server= myServerName/theInstanceName; Database= myDataBase; Trusted_Connection= yes;
 
 
Prompt for username and password
This one is a bit tricky. First you need to set the connection object's Prompt property to adPromptAlways. Then use the connection string to connect to the database.
oConn.Properties("Prompt") = adPromptAlways

 oConn.Open "Provider= SQLNCLI; Server= myServerAddress; DataBase= myDataBase;
 
 
Enabling MARS (multiple active result sets)
Provider= SQLNCLI; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; MARS Connection= True;
Use ADO.NET 2.0 for MARS functionality. MARS is not supported in ADO.NET 1.0 nor ADO.NET 1.1.
Using MARS with SQL Native Client, by Chris Lee
 
Encrypt data sent over network
Provider= SQLNCLI; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; Encrypt= yes;
 
 
Attach a database file on connect to a local SQL Server Express instance
Provider= SQLNCLI; Server= ./SQLExpress; AttachDbFilename= c:/mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Attach a database file, located in the data directory, on connect to a local SQL Server Express instance
Provider= SQLNCLI; Server= ./SQLExpress; AttachDbFilename= |DataDirectory|mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
Download the SQL Native Client here. The package contains booth the ODBC driver and the OLE DB provider
 
Database mirroring
If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.
Provider= SQLNCLI; Data Source= myServerAddress; Failover Partner= myMirrorServerAddress; Initial Catalog= myDataBase; Integrated Security= True;
There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.
Read more about database mirroring in this Microsoft TechNet article "Database Mirroring in SQL Server 2005"
 

.NET Framework Data Provider for OLE DB

Type:    .NET Framework Wrapper Class Library
Usage:  System.Data.OleDb.OleDbConnection
Manufacturer:  Microsoft
More info about this wrapper class library »
Customize string
example values »
Bridging to SQL Native Client OLE DB
This is just one connection string sample for the wrapping OleDbConnection class that calls the underlying OLEDB provider. See respective OLE DB provider for more connection strings to use with this class.
Provider= SQLNCLI; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
 
 

SQL Server Native Client 10.0 OLE DB Provider

Type:    OLE DB Provider
Usage:  Provider=SQLNCLI10
Manufacturer:  Microsoft
More info about this provider »
Customize string
example values »
Standard security
Provider= SQLNCLI10; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
Are you using SQL Server 2005 Express? Don't miss the server name syntax Servername/SQLEXPRESS where you substitute Servername with the name of the computer where the SQL Server 2005 Express installation resides.
 
Trusted connection
Provider= SQLNCLI10; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes;
Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"
 
Connecting to an SQL Server instance
The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.
Provider= SQLNCLI10; Server= myServerName/theInstanceName; Database= myDataBase; Trusted_Connection= yes;
 
 
Prompt for username and password
This one is a bit tricky. First you need to set the connection object's Prompt property to adPromptAlways. Then use the connection string to connect to the database.
oConn.Properties("Prompt") = adPromptAlways

 oConn.Open "Provider= SQLNCLI10; Server= myServerAddress; DataBase= myDataBase;
 
 
Enabling MARS (multiple active result sets)
Provider= SQLNCLI10; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; MARS Connection= True;
Use ADO.NET 2.0 for MARS functionality. MARS is not supported in ADO.NET 1.0 nor ADO.NET 1.1.
Using MARS with SQL Native Client, by Chris Lee
 
Encrypt data sent over network
Provider= SQLNCLI10; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; Encrypt= yes;
 
 
Attach a database file on connect to a local SQL Server Express instance
Provider= SQLNCLI10; Server= ./SQLExpress; AttachDbFilename= c:/mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Attach a database file, located in the data directory, on connect to a local SQL Server Express instance
Provider= SQLNCLI10; Server= ./SQLExpress; AttachDbFilename= |DataDirectory|mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
Download the SQL Native Client here. The package contains booth the ODBC driver and the OLE DB provider
 
Database mirroring
If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.
Provider= SQLNCLI10; Data Source= myServerAddress; Failover Partner= myMirrorServerAddress; Initial Catalog= myDataBase; Integrated Security= True;
There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.
Read more about database mirroring in this Microsoft TechNet article "Database Mirroring in SQL Server 2005"
 

SQL Native Client 9.0 ODBC Driver

Type:    ODBC Driver
Usage:  Driver={SQL Native Client}
Manufacturer:  Microsoft
More info about this driver »
Customize string
example values »
Standard security
Driver= {SQL Native Client}; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
Are you using SQL Server 2005 Express? Don't miss the server name syntax Servername/SQLEXPRESS where you substitute Servername with the name of the computer where the SQL Server 2005 Express installation resides.
 
Trusted Connection
Driver= {SQL Native Client}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes;
Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"
 
Connecting to an SQL Server instance
The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.
Driver= {SQL Native Client}; Server= myServerName/theInstanceName; Database= myDataBase; Trusted_Connection= yes;
 
 
Prompt for username and password
This one is a bit tricky. First you need to set the connection object's Prompt property to adPromptAlways. Then use the connection string to connect to the database.
oConn.Properties("Prompt") = adPromptAlways

 Driver= {SQL Native Client}; Server= myServerAddress; Database= myDataBase;
 
 
Enabling MARS (multiple active result sets)
Driver= {SQL Native Client}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; MARS_Connection= yes;
Use ADO.NET 2.0 for MARS functionality. MARS is not supported in ADO.NET 1.0 nor ADO.NET 1.1.
Using MARS with SQL Native Client, by Chris Lee
 
Encrypt data sent over network
Driver= {SQL Native Client}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; Encrypt= yes;
 
 
Attach a database file on connect to a local SQL Server Express instance
Driver= {SQL Native Client}; Server= ./SQLExpress; AttachDbFilename= c:/mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Attach a database file, located in the data directory, on connect to a local SQL Server Express instance
Driver= {SQL Native Client}; Server= ./SQLExpress; AttachDbFilename= |DataDirectory|mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
Download the SQL Native Client here. The package contains booth the ODBC driver and the OLE DB provider
 
Database mirroring
If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Failover_Partner= myMirrorServerAddress; Database= myDataBase; Trusted_Connection= yes;
There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for booth the main server and the failover partner can solve some reported issues.
Read more about database mirroring in this Microsoft TechNet article "Database Mirroring in SQL Server 2005"
 

SQL Server Native Client 10.0 ODBC Driver

Type:    ODBC Driver
Usage:  Driver={SQL Server Native Client 10.0}
Manufacturer:  Microsoft
More info about this driver »
Customize string
example values »
Standard security
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
 
 
Trusted Connection
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes;
Equivalent key-value pair: "Integrated Security=SSPI" equals "Trusted_Connection=yes"
 
Connecting to an SQL Server instance
The syntax of specifying the server instance in the value of the server key is the same for all connection strings for SQL Server.
Driver= {SQL Server Native Client 10.0}; Server= myServerName/theInstanceName; Database= myDataBase; Trusted_Connection= yes;
 
 
Prompt for username and password
This one is a bit tricky. First you need to set the connection object's Prompt property to adPromptAlways. Then use the connection string to connect to the database.
oConn.Properties("Prompt") = adPromptAlways

 Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase;
 
 
Enabling MARS (multiple active result sets)
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; MARS_Connection= yes;
Use ADO.NET for MARS functionality. MARS is not supported in ADO.NET 1.0 nor ADO.NET 1.1.
Using MARS with SQL Native Client, by Chris Lee
 
Encrypt data sent over network
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase; Trusted_Connection= yes; Encrypt= yes;
 
 
Attach a database file on connect to a local SQL Server Express instance
Driver= {SQL Server Native Client 10.0}; Server= ./SQLExpress; AttachDbFilename= c:/asd/qwe/mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Attach a database file, located in the data directory, on connect to a local SQL Server Express instance
Driver= {SQL Server Native Client 10.0}; Server= ./SQLExpress; AttachDbFilename= |DataDirectory|mydbfile.mdf; Database= dbname; Trusted_Connection= Yes;
Why is the Database parameter needed? If the named database have already been attached, SQL Server does not reattach it. It uses the attached database as the default for the connection.
 
Database mirroring
If you connect with ADO.NET or the SQL Native Client to a database that is being mirrored, your application can take advantage of the drivers ability to automatically redirect connections when a database mirroring failover occurs. You must specify the initial principal server and database in the connection string and the failover partner server.
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Failover_Partner= myMirrorServerAddress; Database= myDataBase; Trusted_Connection= yes;
There is ofcourse many other ways to write the connection string using database mirroring, this is just one example pointing out the failover functionality. You can combine this with the other connection strings options available.

Please note if you are using TCP/IP (using the network library parameter) and database mirroring, including port number in the address (formed as servername,portnumber) for booth the main server and the failover partner can solve some reported issues.
Read more about database mirroring in this Microsoft TechNet article "Database Mirroring in SQL Server 2005"
 

.NET Framework Data Provider for ODBC

Type:    .NET Framework Wrapper Class Library
Usage:  System.Data.Odbc.OdbcConnection
Manufacturer:  Microsoft
More info about this wrapper class library »
Customize string
example values »
Bridging to SQL Native Client 10.0 ODBC Driver
This is just one connection string sample for the wrapping OdbcConnection class that calls the underlying ODBC Driver. See respective ODBC driver for more connection strings to use with this class.
Driver= {SQL Server Native Client 10.0}; Server= myServerAddress; Database= myDataBase; Uid= myUsername; Pwd= myPassword;
 
 

SQLXML 4.0 OLEDB Provider

Type:    OLE DB Provider
Usage:  Provider=SQLXMLOLEDB.4.0;Data Provider=providername
Manufacturer:  Microsoft
More info about this provider »
Customize string
example values »
Using SQL Server Native Client provider
Provider= SQLXMLOLEDB.4.0; Data Provider= SQLNCLI; Data Source= myServerAddress; Initial Catalog= myDataBase; User Id= myUsername; Password= myPassword;
 
 

Context Connection

Type:    .NET Framework Class Library
Usage: 
Manufacturer:  Microsoft
More info about this class library »
Customize string
example values »
Context Connection
Connecting to "self" from within your CLR stored prodedure/function. The context connection lets you execute Transact-SQL statements in the same context (connection) that your code was invoked in the first place.
C#
 using(SqlConnection connection = new SqlConnection("context connection=true"))
 {
     connection.Open();
     // Use the connection
 }

VB.Net
 Using connection as new SqlConnection("context connection=true")
     connection.Open()
     ' Use the connection
 End Using
When to use SQL Native Client?
List of all SqlConnection connection string properties
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西门子1200伺服步进FB块程序的特点和应用。该程序由两个FB组成，分别采用Sc L和梯形图编写，支持PTO脉冲和PN网口模式，适用于多种伺服和步进电机。文中提供了详细的中文注释和关键代码片段，展示了其在不同品牌设备如西门子s120、v90、雷赛步进、三菱伺服等的成功应用案例。此外，还强调了程序的兼容性和灵活性，使其能适应多轴控制和复杂控制需求。 适合人群：从事工业自动化领域的工程师和技术人员，尤其是那些需要深入了解和应用西门子1200伺服步进FB块程序的人群。 使用场景及目标：①用于多轴伺服和步进电机的精确控制；②适用于PTO脉冲和PN网口模式的控制需求；③帮助工程师快速理解和调试程序，提高工作效率。 其他说明：本文不仅提供了理论讲解，还有实际操作指导，确保读者能够在实际项目中顺利应用该FB块程序。
【C语言编程】函数调用规则与实现：函数声明、调用方式及参数传递详解
最新发布
08-13
内容概要：本文详细介绍了C语言中函数调用的相关知识。首先阐述了函数调用的一般形式，强调即使无参函数也需保留括号；当存在多个实参时，它们之间需用逗号分隔且数量与类型须匹配形参。文中特别指出不同编译器对实参求值顺序可能存在差异，如Turbo C++采用从右至左求值。其次，讲解了三种函数调用方式：作为语句执行特定操作、作为表达式返回值参与运算、作为参数传入另一函数。再者，强调了函数声明的重要性，包括库函数需通过预处理指令引入头文件，用户自定义函数若定义在调用之后则需要提前声明，明确了函数声明与定义的区别。最后提供了几个练习题，帮助读者巩固所学知识。; 适合人群：正在学习C语言编程，尤其是对函数调用机制感兴趣的初学者或有一定基础的学习者。; 使用场景及目标：①理解函数调用的基本规则，包括实参与形参的对应关系；②掌握不同编译环境下实参求值顺序的差异；③学会正确地声明和定义函数以确保程序正确运行。; 其他说明：文中还提供了几个实践题目，鼓励读者动手实现pow()、sqrt()函数及字符统计程序，以加深理解。此外，提及了fishc.com网站VIP会员可获取相关资源，支持网站运营和个人发展。
MATLABSimuLink环境下三相STATCOM无功补偿技术的研究与仿真
08-13
内容概要：本文探讨了在MATLAB/SimuLink环境中进行三相STATCOM（静态同步补偿器）无功补偿的技术方法及其仿真过程。首先介绍了STATCOM作为无功功率补偿装置的工作原理，即通过调节交流电压的幅值和相位来实现对无功功率的有效管理。接着详细描述了在MATLAB/SimuLink平台下构建三相STATCOM仿真模型的具体步骤，包括创建新模型、添加电源和负载、搭建主电路、加入控制模块以及完成整个电路的连接。然后阐述了如何通过对STATCOM输出电压和电流的精确调控达到无功补偿的目的，并展示了具体的仿真结果分析方法，如读取仿真数据、提取关键参数、绘制无功功率变化曲线等。最后指出，这种技术可以显著提升电力系统的稳定性与电能质量，展望了STATCOM在未来的发展潜力。 适合人群：电气工程专业学生、从事电力系统相关工作的技术人员、希望深入了解无功补偿技术的研究人员。 使用场景及目标：适用于想要掌握MATLAB/SimuLink软件操作技能的人群，特别是那些专注于电力电子领域的从业者；旨在帮助他们学会建立复杂的电力系统仿真模型，以便更好地理解STATCOM的工作机制，进而优化实际项目中的无功补偿方案。 其他说明：文中提供的实例代码可以帮助读者直观地了解如何从零开始构建一个完整的三相STATCOM仿真环境，并通过图形化的方式展示无功补偿的效果，便于进一步的学习与研究。
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